197 lines
5.2 KiB
HTML
197 lines
5.2 KiB
HTML
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
|
|
<html>
|
|
<head>
|
|
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
|
|
<meta name="Copyright" content="Copyright (c) 2006 by IBM Corporation">
|
|
<title>pthread_attr_getdetachstate()--Get Thread Attributes Object
|
|
Detachstate</title>
|
|
<!-- All rights reserved. Licensed Materials Property of IBM -->
|
|
<!-- US Government Users Restricted Rights -->
|
|
<!-- Use, duplication or disclosure restricted by -->
|
|
<!-- GSA ADP Schedule Contract with IBM Corp. -->
|
|
<!-- Begin Header Records ========================================== -->
|
|
<!-- NETMG2 SCRIPT A converted by B2H R4.1 (346) (CMS) by HOLTJM at -->
|
|
<!-- RCHVMW2 on 29 Jan 1999 at 10:01:37 -->
|
|
<!--File Edited November 2001 -->
|
|
<!--End Header Records -->
|
|
<link rel="stylesheet" type="text/css" href="../rzahg/ic.css">
|
|
</head>
|
|
<body>
|
|
|
|
<!-- Java sync-link -->
|
|
<script language="Javascript" src="../rzahg/synch.js" type="text/javascript">
|
|
</script>
|
|
|
|
<a name="Top_Of_Page"></a>
|
|
|
|
<h2>pthread_attr_getdetachstate()--Get Thread Attributes Object
|
|
Detachstate</h2>
|
|
|
|
<div class="box" style="width: 70%;">
|
|
<br>
|
|
Syntax:
|
|
|
|
<pre>
|
|
#include <pthread.h>
|
|
int pthread_attr_getdetachstate(const pthread_attr_t *attr,
|
|
int *detachstate);
|
|
</pre>
|
|
Service Program Name: QP0WPTHR<br>
|
|
<!-- iddvc RMBR -->
|
|
<br>
|
|
Default Public Authority: *USE<br>
|
|
<!-- iddvc RMBR -->
|
|
<br>
|
|
Threadsafe: Yes<br>
|
|
<!-- iddvc RMBR -->
|
|
<br>
|
|
Signal Safe: Yes<br>
|
|
<!-- iddvc RMBR -->
|
|
<br>
|
|
</div>
|
|
|
|
<p>The <strong>pthread_attr_getdetachstate</strong>() function returns the
|
|
detach state attribute from the thread attributes object specified. The detach
|
|
state of a thread indicates whether the system is allowed to free thread
|
|
resources when a thread terminates.</p>
|
|
|
|
<p>The detach state specifies one of <strong>PTHREAD_CREATE_DETACHED</strong>
|
|
or <strong>PTHREAD_CREATE_JOINABLE</strong>. The default detach state
|
|
(<strong>DEFAULT_DETACHSTATE</strong>) is
|
|
<strong>PTHREAD_CREATE_JOINABLE</strong>.</p>
|
|
|
|
<br>
|
|
<h3>Authorities and Locks</h3>
|
|
|
|
<p>None.</p>
|
|
|
|
<br>
|
|
<h3>Parameters</h3>
|
|
|
|
<dl>
|
|
<dt><strong>attr</strong></dt>
|
|
|
|
<dd><p>(Input) The address of the thread attributes object</p></dd>
|
|
|
|
<dt><strong>detachstate</strong></dt>
|
|
|
|
<dd><p>(Output) The address of the variable to contain the returned detach
|
|
state</p></dd>
|
|
</dl>
|
|
|
|
<br>
|
|
<h3>Return Value</h3>
|
|
|
|
<dl>
|
|
<dt><strong>0</strong></dt>
|
|
|
|
<dd><strong>pthread_attr_getdetachstate</strong>() was successful. </dd>
|
|
|
|
<dt><strong>value</strong></dt>
|
|
|
|
<dd><strong>pthread_attr_getdetachstate</strong>() was not successful.
|
|
<em>value</em> is set to indicate the error condition.</dd>
|
|
</dl>
|
|
|
|
<br>
|
|
<h3>Error Conditions</h3>
|
|
|
|
<p>If <strong>pthread_attr_getdetachstate</strong>() was not successful, the
|
|
error condition returned usually indicates one of the following errors. Under
|
|
some conditions, the value returned could indicate an error other than those
|
|
listed here.</p>
|
|
|
|
<dl>
|
|
<dt><em>[EINVAL]</em></dt>
|
|
|
|
<dd><p>The value specified for the argument is not correct.</p></dd>
|
|
</dl>
|
|
|
|
<br>
|
|
<h3>Related Information</h3>
|
|
|
|
<ul>
|
|
<li>The <<strong>pthread.h</strong>> header file. See <a href=
|
|
"rzah4hed.htm">Header files for Pthread functions</a>.<br><br></li>
|
|
|
|
<li><a href="users_10.htm">pthread_attr_setdetachstate()--Set Thread Attributes
|
|
Object Detachstate</a><br><br></li>
|
|
|
|
<li><a href="users_16.htm">pthread_detach()</a>--Detach Thread<br><br></li>
|
|
|
|
<li><a href="users_25.htm">pthread_join()</a>--Wait for and Detach Thread</li>
|
|
</ul>
|
|
|
|
<br>
|
|
<h3>Example</h3>
|
|
<p>See <a href="../apiref/aboutapis.htm#codedisclaimer">Code disclaimer information</a>
|
|
for information pertaining to code examples.</p>
|
|
<pre>
|
|
#define _MULTI_THREADED
|
|
#include <pthread.h>
|
|
#include <stdio.h>
|
|
#include "check.h"
|
|
|
|
int main(int argc, char **argv)
|
|
{
|
|
pthread_t thread;
|
|
int rc=0;
|
|
pthread_attr_t pta;
|
|
int state;
|
|
|
|
printf("Enter Testcase - %s\n", argv[0]);
|
|
|
|
printf("Create a thread attributes object\n");
|
|
rc = pthread_attr_init(&pta);
|
|
checkResults("pthread_attr_init()\n", rc);
|
|
|
|
printf("Get detach state\n");
|
|
rc = pthread_attr_getdetachstate(&pta, &state);
|
|
checkResults("pthread_attr_getdetachstate()\n", rc);
|
|
|
|
printf("The thread attributes object indicates: ");
|
|
switch (state) {
|
|
case PTHREAD_CREATE_DETACHED:
|
|
printf("DETACHED\n");
|
|
break;
|
|
case PTHREAD_CREATE_JOINABLE:
|
|
printf("JOINABLE\n");
|
|
break;
|
|
}
|
|
|
|
printf("Destroy thread attributes object\n");
|
|
rc = pthread_attr_destroy(&pta);
|
|
checkResults("pthread_attr_destroy()\n", rc);
|
|
|
|
printf("Main completed\n");
|
|
return 0;
|
|
}
|
|
</pre>
|
|
|
|
<p><strong>Output:</strong></p>
|
|
|
|
<pre>
|
|
Enter Testcase - QP0WTEST/TAGDS0
|
|
Create a thread attributes object
|
|
Get detach state
|
|
The thread attributes object indicates: JOINABLE
|
|
Destroy thread attributes object
|
|
Main completed
|
|
</pre>
|
|
<br>
|
|
<hr>
|
|
API introduced: V4R3
|
|
<hr>
|
|
<center>
|
|
<table cellpadding="2" cellspacing="2">
|
|
<tr align="center">
|
|
<td valign="middle" align="center"><a href="#Top_Of_Page">Top</a> | <a href=
|
|
"rzah4mst.htm">Pthread APIs</a> | <a href="aplist.htm">APIs by
|
|
category</a></td>
|
|
</tr>
|
|
</table>
|
|
</center>
|
|
</body>
|
|
</html>
|
|
|